Introduction, Adsl Technology | Fujitsu FC9660RA12 specification

1 Introduction

Congratulations on your purchase of a Digital Subscriber Line (DSL) modem. The DSL modem is part of a system that provides an integrated end-to-end solution for data connectivity, multimedia services, and high-speed Internet access services using asymmetrical digital subscriber line (ADSL) transmission over your current telephone wiring. With ADSL technology, information can be processed at speeds up to 250 times faster than today’s analog modems.

1.1 ADSL Technology

The ADSL technology uses advanced digital modulation to transmit at high speeds over standard telephone wiring. This technology can download data at speeds up to 8 megabits per second and upload data at speeds up to 768 kilobytes per second.

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DSL Modem

Local Telephone

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By using a DSL modem, Internet service providers and local telephone companies can offer high-speed Internet access, virtual private networks (VPNs), telecommuting, video on demand, and other broadband services.

There are two methods of installing the DSL modem service in the home. Both methods are explained in the following chapters. The first method, using microfilters, is explained in Chapter 3. The microfilter removes high-frequency noise from